NOTE The following text is a quote: September 8, 2010 2 men plead guilty to impersonating U.S. Customs and Border Protection officers in advance fee fraud scheme MIAMI - Saleumsak Khammungkhune, 57, of San Diego, and David Johnson, aka Ukoha Eke, 39, a Nigerian national residing in Upper Marlboro, Md., pleaded guilty to conspiring to impersonate U. S. officers and to commit wire fraud following an investigation by U.S. Immigration and Customs Enforcement (ICE) Office of Professional Responsibility (OPR). David Johnson pleaded guilty earlier today before U.S. District Judge William Dimitrouleas to conspiracy to impersonate a federal officer and to...